WO2012120896A1 - Module de charge sans contact, dispositif de charge sans contact, et procédé de fabrication de module de charge sans contact - Google Patents

Module de charge sans contact, dispositif de charge sans contact, et procédé de fabrication de module de charge sans contact Download PDF

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Publication number
WO2012120896A1
WO2012120896A1 PCT/JP2012/001640 JP2012001640W WO2012120896A1 WO 2012120896 A1 WO2012120896 A1 WO 2012120896A1 JP 2012001640 W JP2012001640 W JP 2012001640W WO 2012120896 A1 WO2012120896 A1 WO 2012120896A1
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WO
WIPO (PCT)
Prior art keywords
slit
magnetic sheet
charging module
slits
coil
Prior art date
Application number
PCT/JP2012/001640
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English (en)
Japanese (ja)
Inventor
健一郎 田畑
徳次 西野
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2011051218A external-priority patent/JP4835801B1/ja
Priority claimed from JP2011051200A external-priority patent/JP4835800B1/ja
Priority claimed from JP2011051199A external-priority patent/JP4962634B1/ja
Priority claimed from JP2011135945A external-priority patent/JP4900524B1/ja
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to US14/002,508 priority Critical patent/US8749195B2/en
Priority to EP12755170.3A priority patent/EP2669913B1/fr
Priority to CN201290000326.9U priority patent/CN203706837U/zh
Publication of WO2012120896A1 publication Critical patent/WO2012120896A1/fr
Priority to US14/266,288 priority patent/US8963491B2/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2871—Pancake coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction

Definitions

  • the present invention relates to a non-contact charging module, a non-contact charging device, and a method for manufacturing a non-contact charging module having a planar coil portion around which a conductive wire is wound and a magnetic sheet.
  • a power transmission coil is arranged on the charger side
  • a power reception coil is arranged on the main device side
  • electromagnetic induction is generated between the two coils to transmit power from the charger side to the main device side. It has also been proposed to apply a mobile terminal device or the like as the main device.
  • the non-contact charging module used for the main device such as the portable terminal device and the charger is required to be thin and small.
  • this type of non-contact charging module includes a planar coil portion as a power transmission coil or a power reception coil, and a magnetic sheet, as in (Patent Document 1).
  • the magnetic sheet there is a sheet having a flexibility by inserting a slit as in (Patent Document 2).
  • JP 2006-42519 A Japanese Patent No. 4400509
  • the magnetic sheet employed in the non-contact charging module described in (Patent Document 1) is a flat magnetic sheet and has a problem that it does not have flexibility. For this reason, a magnetic sheet will be damaged by the way of handling a non-contact charge module, and it will have a bad influence on an electric power transmission characteristic.
  • Patent Document 2 it has been studied to mount a magnetic sheet described in (Patent Document 2) having flexibility by inserting a slit in this kind of non-contact charging module.
  • the magnetic sheet described in (Patent Document 2) is employed in the non-contact charging module, the magnetic sheet comes to have flexibility, but the power transmission efficiency is lowered by the slit group.
  • An object of the present invention is to employ a magnetic sheet having flexibility with slits, thereby preventing the magnetic sheet from being damaged and adversely affecting the power transmission characteristics, and the power of the non-contact charging module.
  • the non-contact charging module includes a planar coil portion around which a conductive wire is wound, a magnetic sheet on which a coil surface of the planar coil portion is placed, the magnetic sheet, and a winding start of the planar coil portion.
  • a plurality of flexible slits extending from a point to the end of the magnetic sheet and containing a recess or slit for accommodating a part of the conducting wire of the planar coil portion, and a plurality of flexible slits for imparting flexibility to the magnetic sheet.
  • At least one of the slits adopts a configuration in which a virtual extension line of the flexible slit is disposed within the width of the recess or slit.
  • the non-contact charging device of the present invention adopts a configuration including the non-contact charging module.
  • a plurality of cuts are formed on one surface of the ferrite sheet, and then the other surface that is opposite to the one surface and the one surface of the ferrite sheet.
  • a sheet that holds the ferrite sheet is bonded to each of the surfaces, then the ferrite sheet is fired, and then the ferrite sheet is pressurized to form slits that divide the ferrite sheet at the plurality of cuts.
  • the planar coil portion is bonded to the ferrite sheet on the one surface side of the ferrite sheet by bonding a planar coil portion wound with a conductive wire through the sheet.
  • the other surface is bonded while avoiding the protrusion formed at the position corresponding to the slit.
  • the magnetic sheet is prevented from being damaged and adversely affecting the power transmission characteristics, and the planar coil portion
  • a flexible slit in the recess or slit of the magnetic sheet that houses the conducting wire, it is possible to prevent the power transmission efficiency of the non-contact charging module from being greatly reduced.
  • FIG. 1 is an assembly diagram of a contactless charging module according to an embodiment of the present invention.
  • 2A and 2B are conceptual diagrams of a contactless charging module according to an embodiment of the present invention, in which FIG. 2A is a top view, FIG. 2B is a cross-sectional view as viewed from the direction AA ′ in FIG.
  • FIG. 2C is a cross-sectional view seen from the BB ′ direction in FIG.
  • FIG. 3 is a detailed view of the magnetic sheet of the non-contact charging module according to the embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a difference in slit length depending on the slit shape of the non-contact charging module according to the embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a difference in slit length depending on the slit shape of the non-contact charging module according to the embodiment of the present invention.
  • the diameters of the conductors of the slits and the coil 21 provided in the magnetic sheet 3 are very close to each other.
  • the diameter of the conductor is about 0.25 to 0.35 mm
  • the slit is about 2 mm. It is. Of course, it is not limited to this value.
  • the contactless charging module 1 of the present invention includes a planar coil portion 2 in which a conductive wire is wound in a spiral shape, and a magnetic sheet provided so as to face the surface of a coil 21 of the planar coil portion 2. 3.
  • the coil 21 of the planar coil portion 2 is bonded to the surface of the magnetic sheet 3 where no protrusion is generated using an adhesive. The protrusion will be described in detail later.
  • the planar coil unit 2 includes a coil 21 in which a conductor is wound in a radial direction so as to draw a vortex on the surface, and terminals 22 and 23 provided at both ends of the coil 21.
  • the coil 21 is obtained by winding a conducting wire in parallel on a plane, and a surface formed by the coil is called a coil surface.
  • the coil 21 is wound outward from an inner diameter of 20 mm in diameter, and the outer diameter is 30 mm. That is, the coil 21 is wound in a donut shape.
  • the coil 21 may be wound in a circular shape or may be wound in a polygonal shape.
  • the conducting wires are wound so as to leave a space between each other, the stray capacitance between the upper conducting wire and the lower conducting wire is reduced, and the AC resistance of the coil 21 can be kept small. Moreover, the thickness of the coil 21 can be suppressed by winding so that space may be packed.
  • the cross section of the conducting wire of the coil 21 is circular, but it may be rectangular or the like.
  • a gap is formed between adjacent conductors, so that the stray capacitance between the conductors is reduced, and the AC resistance of the coil 21 can be kept small. it can.
  • the coil 21 is wound in one stage rather than being wound in two stages in the thickness direction, and the alternating current resistance of the coil 21 is lowered, and the transmission efficiency can be increased. This is because when a conducting wire is wound in two stages, stray capacitance is generated between the upper conducting wire and the lower conducting wire. Therefore, it is better to wind as many portions as possible in one stage, rather than winding the entire coil 21 in two stages. Moreover, it can reduce in thickness as the non-contact charge module 1 by winding in 1 step
  • the low AC resistance of the coil 21 prevents loss in the coil 21 and improves the L value, which is the inductance of the coil 21, thereby improving the power transmission efficiency of the contactless charging module 1 that depends on the L value. be able to.
  • the inner diameter X inside the coil 21 shown in FIG. 2 is 10 mm to 20 mm, and the outer diameter Y is about 30 mm.
  • the terminals 22 and 23 may be close to each other or may be disposed apart from each other, the contactless charging module 1 is easier to mount if they are disposed apart.
  • the magnetic sheet 3 is provided in order to improve the power transmission efficiency of non-contact charging using electromagnetic induction and to reduce magnetic flux leakage to the back side of the magnetic sheet 3, as shown in FIG. 2 (a).
  • the magnetic sheet 3 is provided with V-shaped vertical and horizontal slits 36 in the vertical and horizontal directions at intervals of 2 mm in the magnetic sheet 3 in order to provide flexibility of the sheet. . That is, a plurality of cuts are made on one side of the magnetic sheet 3, a tape is attached to both sides of the magnetic sheet 3, and the cut and cut surfaces are pressed to create the vertical and horizontal slits 36.
  • the shape of the vertical and horizontal slits 36 may be any shape as long as it is formed in a groove shape, for example, a U shape.
  • the vertical and horizontal slits 36 are described exaggeratedly than the other parts, but the actual vertical and horizontal slits 36 (grooves formed on one surface of the magnetic sheet 3) in the width direction are shown.
  • the dimension is about 1/10 of the conductor diameter of the coil 21.
  • the central portion 32 of the magnetic sheet 3 does not necessarily need to be removed from the cylinder.
  • the same surface as the flat part 31 may be sufficient, and a concave shape or a convex shape may be sufficient.
  • the conducting wire (corresponding to the black circle in FIG. 2C) from the winding end of the coil 21 to the terminal 23 is accommodated in the slit 34.
  • the terminals 22 and 23 can be formed without bending the conducting wire.
  • the length of the slit 34 is about 15 mm to 20 mm. However, the length of the slit 34 depends on the inner diameter of the coil 21.
  • the slit 34 may be formed at a portion where the end of the magnetic sheet 3 and the outer periphery of the center portion 32 are closest to each other. Thereby, the formation area of the slit 34 can be suppressed to the minimum, and the transmission efficiency of the non-contact charging module 1 can be improved.
  • the length of the slit 34 is about 5 mm to 10 mm. In either arrangement, the inner end of the slit 34 is connected to the central portion 32.
  • the slits 34 may be arranged in other ways. That is, it is desirable that the coil 21 has a one-stage structure as much as possible. In that case, all the turns in the radial direction of the coil 21 are made into a one-stage structure, or one part is made into a one-stage structure and the other part is made into a two-stage structure. It is possible to do. Therefore, one of the terminals 22 and 23 can be pulled out from the outer periphery of the coil 21, but the other must be pulled out from the inside. Therefore, the portion around which the coil 21 is wound and the foot 24 (FIG. 8) always overlap in the thickness direction. Therefore, a slit 34 may be provided in the overlapping portion, and the foot 24 may be accommodated therein.
  • the height of the non-contact charge module 1 can be made the same in the part which the conducting wire of the coil 21 overlaps, and the part which does not overlap.
  • the foot portion 24 refers to a portion from the end of winding of the coil 21 to the terminal 22 or 23.
  • the slit 34 is the recessed part 33 (FIG. 8)
  • a through-hole and a slit will not be provided in the magnetic sheet 3
  • it will prevent a magnetic flux from leaking and the power transmission efficiency of the non-contact charging module 1 will be improved.
  • the magnetic sheet 3 can be easily formed.
  • the concave portion 33 is not limited to the concave portion 33 having a square cross section, and may be arcuate or rounded.
  • the slit 34 is parallel to the tangent of the circumference of the inner circumference of the coil 21 surface, and extends in the shortest distance from the start or end of winding of the coil surface to the end of the magnetic sheet 3. Is.
  • the tangent to the circumference of the inner circumference of the coil 21 surface means that the slit 34 extends from the vicinity of the outer circumference of the inner circumference of the coil 21 surface, and the slit 34 approaches the outer circumference of the inner circumference of the coil 21 surface. Is the tangent of the circumference of the inner circle at.
  • the conducting wire in order to provide the slit 34 and insert the conducting wire into the slit 34, the conducting wire must be refracted in the thickness direction from the flat portion 31 toward the slit 34. Therefore, since the conducting wire is not bent on the magnetic sheet 3 at the portion where the conducting wire is fitted from the flat portion 31 toward the slit 34, it is possible to reduce the thickness while maintaining the strength of the conducting wire.
  • the length of the straight portion of the slit 34 is about 15 mm to 20 mm.
  • the coil 21 may be wound in a polygonal shape. In this case, the coil 21 is parallel to the shape of the space formed by the inner end portion of the surface of the coil 21 or the tangent line thereof, and is the point at the beginning or end of winding of the coil surface. It is preferable to provide the slit 34 in a straight line extending at the shortest distance from the magnetic sheet 3 to the end of the magnetic sheet 3.
  • the slit 34 extends perpendicularly to the tangent to the circumference of the inner circumference of the coil 21 surface and extends to the end of the magnetic sheet 3 from the winding start point or winding end point to the end of the magnetic sheet 3. May be formed. Thereby, the formation area of the slit 34 can be suppressed to the minimum, and the transmission efficiency of the non-contact charging module 1 can be improved. That is, by providing the slit 34, a part of the magnetic sheet 3 is missing or thinned. Therefore, the magnetic flux leaks from the slit 34, and the power transmission efficiency of the non-contact charging module may be somewhat reduced.
  • the length of the straight portion of the slit 34 is about 5 mm to 10 mm.
  • the coil 21 may be wound in a polygonal shape, and in that case, the coil 21 may be perpendicular to the shape of the space formed by the inner end of the surface of the coil 21 or its tangent line.
  • the slit 34 may be provided in a straight line extending at the shortest distance from the end point to the end of the magnetic sheet 3.
  • a Ni—Zn ferrite sheet, a Mn—Zn ferrite sheet, a Mg—Zn ferrite sheet, or the like can be used as the magnetic sheet 3.
  • the ferrite sheet can reduce the AC resistance of the coil 21 as compared with the amorphous metal magnetic sheet.
  • the magnetic sheet 3 has at least a high saturation magnetic flux density material and a high magnetic permeability material laminated. Even when the high saturation magnetic flux density material and the high magnetic permeability material are not laminated, it is preferable to use a high saturation magnetic flux density material having a saturation magnetic flux density of 350 mT or more and a thickness of at least 300 ⁇ m.
  • the magnetic sheet 3 has a size of about 33 mm ⁇ 33 mm, and is laminated by setting the thicknesses of the high saturation magnetic flux density material and the high magnetic permeability material.
  • the thickness of the magnetic sheet 3 is 0.6 mm, the thickness of the high saturation magnetic flux density material is 0.45 mm, and the thickness of the high permeability material is 0.15 mm.
  • the slit 34 is parallel to one pair of opposing end sides of the rectangular magnetic sheet 3 and perpendicular to the other pair of opposing end sides.
  • the magnetic sheet 3 of the present embodiment is square.
  • the shape of the magnetic sheet 3 is not limited to a square, and various shapes such as a circle and a polygon can be considered. Therefore, for example, the shape of the magnetic sheet 3 is polygonal, and the slit 34 is perpendicular to the side against which one end abuts, thereby minimizing the area of the slit 34 in the polygonal magnetic sheet that is easy to use. Can do.
  • the shape of the magnetic sheet 3 is rectangular, and is parallel to one pair of opposing end sides of the magnetic sheet 3 and perpendicular to the other pair of opposing end sides.
  • the area of the slit 34 can be minimized in an easily usable rectangular magnetic sheet.
  • the slit 34 is provided at a portion where the coil 21 and the foot 24 overlap each other, and the surface of the coil 21 is provided on the flat portion 31.
  • the slit 34 may be provided slightly longer or shorter, but it is preferable that at least 80% or more of the portion where the coil 21 and the foot 24 overlap each other can be covered.
  • the magnetic sheet 3 is provided with vertical and horizontal slits 36 at substantially equal intervals in the vertical and horizontal directions.
  • the configuration of the magnetic sheet 3 is described in detail in (Patent Document 2).
  • the longitudinal slit 36 a is substantially parallel to the end side 3 a of the magnetic sheet 3
  • the lateral slit 36 b is substantially parallel to the end side 3 b of the magnetic sheet 3.
  • the slit 34 extends in a straight line from the end side 3 b of the magnetic sheet 3 toward the circumference of the inner circumference, substantially parallel to the end side 3 a of the magnetic sheet 3. That is, the longitudinal slit 36 a is formed substantially parallel to the end portion 33 a of the slit 34. Furthermore, it overlaps with the same position as the position where at least one or more vertical slits 36a are formed.
  • the width of the slit 34 is 2 mm and the interval between the longitudinal slits 36a is 1.5 mm.
  • the width of the slit 34 is approximately 1 to 3 mm, and the interval between the longitudinal slits 36a is approximately 1 to 3 mm. Set it with.
  • the end 33a of the slit 34 and the longitudinal slit 36a are substantially parallel to each other. Therefore, as is apparent from the AA ′ cross-sectional view of FIG. 3), the longitudinal slit 36a extends, and the longitudinal slit 36a is interrupted at the slit 34. Therefore, the area where the magnetic sheet 3 is to be thinned which deteriorates the magnetic characteristics of the magnetic sheet 3 by this configuration does not increase by overlapping the slit 34 and the longitudinal slit 36a. Can be prevented from being adversely affected, and the power transmission efficiency of the non-contact charging module 1 can be prevented from being greatly reduced.
  • region where the film thickness of the magnetic sheet 3 becomes thin does not increase, it can prevent increasing the magnetic flux leakage to the magnetic sheet 3 back surface side.
  • the flexibility of the magnetic sheet 3 can be further increased.
  • the slit 34 and the longitudinal slit 36a do not cross each other obliquely, and the area where the magnetic sheet 3 is broken down into small pieces is small. Therefore, the increase in the area where the film thickness of the magnetic sheet 3 is reduced is prevented, the power transmission characteristics of the contactless charging module 1 are prevented from being adversely affected, and the power transmission efficiency of the contactless charging module 1 is greatly reduced. Can be prevented.
  • the slit 34 and the longitudinal slit 36a do not cross obliquely, and the area where the magnetic sheet 3 is broken down into small pieces is small. Therefore, the increase in the area where the film thickness of the magnetic sheet 3 is reduced is prevented, the power transmission characteristics of the contactless charging module 1 are prevented from being adversely affected, and the power transmission efficiency of the contactless charging module 1 is greatly reduced. Can be prevented.
  • FIG. 4A shows the case of the vertical and horizontal slits 36 in which the end of the rectangular magnetic sheet 3 and each slit are configured in parallel
  • FIG. 4B shows the end of the rectangular magnetic sheet 3 and each slit.
  • This is the case of the oblique slit 37 that is inclined at an angle of 45 degrees. Since the angle formed between the end of the rectangular magnetic sheet 3 formed by straight lines and each slit can be arbitrarily set within the above-described angle, these two angles may be discussed representatively.
  • the ratio in which the diagonal slits 37 are present in the vicinity of the diagonal region of the magnetic sheet 3 compared to the vertical and horizontal slits 36. Will increase.
  • the diagonal slit length increases as the angle formed between the end of the rectangular magnetic sheet 3 and each slit increases from an angle of 0 degrees to an angle of 45 degrees.
  • the vertical and horizontal slits 36 in which the slits with the end sides of the rectangular magnetic sheet 3 are configured in parallel are the total length of the vertical and horizontal slits 36 within the unit area in the vicinity of the end portion of the magnetic sheet 3, particularly in the diagonal region. Becomes shorter. That is, since the length of the slit formed in the magnetic sheet 3 is not increased more than necessary, the non-contact charging module 1 using the magnetic sheet 3 having the vertical and horizontal slits 36 while having flexibility according to the request transmits the power. A decrease in efficiency can be prevented.
  • the coil 21 The portion occupied by the slit with respect to the opposing area becomes large. That is, in the end region of the magnetic sheet 3, the presence of minute divided regions such as small triangles increases due to the crossing of the slits of the oblique slits 37.
  • the portion of the magnetic sheet 3 facing the coil 21 is increased in the portion where the minute divided region of the slit occupies, the leakage magnetic flux increases through the slit of the minute divided region, and the power transmission efficiency of the contactless charging module 1 decreases. Resulting in. In particular, when the winding shape of the coil 21 is a rectangle, this influence becomes large.
  • the areas of the above-mentioned minute divided regions are different, and the areas of the minute divided regions on the magnetic sheet 3 facing the coil 21 vary, so that the magnetic characteristics of the coil 21 also vary.
  • the vertical and horizontal slits 36 in which the edges of the rectangular magnetic sheet 3 and the slits are parallel to each other can eliminate or divide the minute divided regions as much as possible, thereby reducing variations in the magnetic characteristics of the coil 21. can do.
  • the shape of the magnetic sheet 3 is rectangular, the longitudinal slit 36 a is substantially parallel to the end side 3 a of the magnetic sheet 3, and the lateral slit 36 b is substantially parallel to the end side 3 b of the magnetic sheet 3.
  • the vertical and horizontal slits 36 and the edges 3a and 3b of the magnetic sheet 3 do not cross obliquely, and there are few areas where the magnetic sheet 3 is broken down into small pieces. Since the portion of the magnetic sheet 3 that is opposed to the coil 21 in the portion facing the coil 21 is small, there is little leakage magnetic flux through the slit of the minute divided region, and the power transmission efficiency of the contactless charging module 1 is reduced. This can be prevented. That is, since the portion where the vertical and horizontal slits 36 are formed is not enlarged more than necessary, it is possible to prevent the power transmission efficiency of the contactless charging module 1 using the magnetic sheet 3 from being lowered.
  • the longitudinal slit 36a and the lateral slit 36b are orthogonal to each other, so that they do not obliquely intersect with the edges 3a and 3b of the magnetic sheet 3, and the area where the magnetic sheet 3 is decomposed into small pieces is further reduced. be able to. That is, since the area where the vertical and horizontal slits 36 are formed is not increased more than necessary, it is possible to prevent the power transmission efficiency of the non-contact charging module 1 using the magnetic sheet 3 from being lowered.
  • the coil 21 is formed by winding a conducting wire in a circle and the shape of the magnetic sheet 3 is a square. That is, since the shape of the square magnetic sheet 3 that matches the circular coil 21 is used, the unnecessary portion of the magnetic sheet 3 that does not contribute to power transmission is very small, and the non-contact charging module 1 has the minimum necessary amount. It can be configured in size and can be miniaturized.
  • the end of the rectangular magnetic sheet 3 and the slits of the vertical and horizontal slits 36 are configured in parallel. As a result, it is possible to reduce the portion where the vertical and horizontal slits 36 are formed while ensuring the flexibility of the magnetic sheet 3.
  • the portion of the vertical and horizontal slits 36 on the outer peripheral side where the coil 21 is disposed in the magnetic sheet 3 can be minimized. As a result, even if it is the magnetic sheet 3 provided with the softness
  • the vertical slit 36a and the horizontal slit 36b are formed at substantially the same interval.
  • the magnetic sheet has no directionality, and has flexibility in two vertical and horizontal directions.
  • FIG. 5 is a diagram showing the slit shape of the magnetic sheet of the contactless charging module according to the embodiment of the present invention
  • FIG. 5 (a) is a top view thereof
  • FIG. 5 (b) is a diagram in the case where the slit 34 is provided.
  • FIG. 5A is a cross-sectional view taken along the line AA ′
  • FIG. 5C is a cross-sectional view taken along the line AA ′ of FIG.
  • the width of the slit 34 (slit that accommodates part of the conducting wire) is W and the interval length of the longitudinal slit 36 a (the slit that gives the magnetic sheet flexibility together with the lateral slit 36 b) is P
  • the width of the slit 34 and the interval length of the longitudinal slit 36a are set so that W> P
  • the interrupted imaginary line of the longitudinal slit 36a (the slit disappeared in the slit 34; Equivalent) is present in the width of the slit 34 at least one or more. If this relational expression is satisfied, the number of the longitudinal slits 36a can be set so as to be increased in the magnetic sheet 3, and the flexibility of the magnetic sheet 3 can be increased. Further, a large number of longitudinal slits 36a can be accommodated in the slit 34, and the effect of preventing the power transmission characteristics of the non-contact charging module 1 from being lowered can be enhanced.
  • the longitudinal slit 36 a and the slit 34 may be arranged in the magnetic sheet 3 so that one longitudinal slit 36 a exists in the slit 34.
  • the slit 34 has been described as having a slit shape, it may have the shape of the recess 33 as shown in the AA ′ cross-sectional view of FIG.
  • the longitudinal slit 36a extends in the magnetic sheet, and when the slit 34 reaches the slit 34, the longitudinal slit 36a disappears. The slit 36a remains.
  • the end portion 33a of the slit 34 and the longitudinal slit 36a are substantially parallel to each other, and as is apparent from the AA ′ cross-sectional views of FIGS. 5B and 5C, the magnetic sheet 3, the longitudinal slit 36a extends from the end 3b (the upper part of the magnetic sheet 3 in FIG. 5), and the longitudinal slit 36a is interrupted at the side wall (point P) of the slit 34 or the recess 33 (the extension line is shown in the figure). Equivalent to the dotted line part 5).
  • a plurality of longitudinal slits 36a which are flexible slits that give flexibility to the magnetic sheet, are parallel to the longitudinal direction of the slits 34 or the recesses 33, and the longitudinal slits 36a are parallel to the longitudinal direction of the recesses 33 or the slits 34. Any one (at least one) extends from the end side 3 b of the magnetic sheet 3 toward a point P that is a side end of the concave portion 33 or the slit 34. As shown in FIG. 5 (a), the recess 33 or the slit 34 is always the end 33a, which is a side wall extending in the longitudinal direction parallel to the end 3a of the magnetic sheet 3, and the side end connecting the end 33a. Is provided.
  • the portion near the center of the magnetic sheet 3 and corresponding to the hollow portion of the coil 21 is a through hole, so that the side end portion where the point P is located is between the end portions 33a which are both side walls. Are not directly connected (connected through the circumference of the through hole). However, if there is no through hole at the center, it is directly connected. And the point P is located on this side end. That is, the point P, which is the point where the vertical slit 36a and the concave portion 33 or the slit 34 meet, is not located in a portion of the concave portion 33 or the end portion 33a of the slit 34 that is parallel to the vertical slit 36a.
  • the extension line of the longitudinal slit (dotted line in FIG. 5A) that collides with the side edge of the concave portion 33 or the slit 34 at the point P is parallel to the concave portion 33 or the slit 34. Extend in. In this way, since the longitudinal slit 36a that collides with the side edge of the recess 33 or the slit 34 partially overlaps the recess 33 or the slit 34, the leakage of the magnetic flux of the planar coil portion 2 is minimized as described above. Can be suppressed.
  • the area where the magnetic sheet 3 is to be thinned which deteriorates the magnetic characteristics of the magnetic sheet 3 by this configuration does not increase by overlapping the slit 34 and the longitudinal slit 36a. Can be prevented from being adversely affected, and the power transmission efficiency of the non-contact charging module 1 can be prevented from being greatly reduced. Furthermore, since the area
  • the non-contact power transmission device includes a charger including a power transmission coil and a magnetic sheet, and a main device including a power receiving coil and a magnetic sheet.
  • the main device is an electronic device such as a mobile phone.
  • the circuit on the charger side includes a rectifying / smoothing circuit unit, a voltage conversion circuit unit, an oscillation circuit unit, a display circuit unit, a control circuit unit, and the power transmission coil.
  • the circuit on the main device side includes the power receiving coil, a rectifier circuit unit, a control circuit unit, and a load L mainly composed of a secondary battery.
  • the power transmission from the charger to the main device is performed using an electromagnetic induction action between the power transmission coil of the charger on the primary side and the power receiving coil of the main device on the secondary side.
  • the non-contact charging device of the present embodiment includes the non-contact charging module described above, the non-contact charging device is provided in a state in which the cross-sectional area of the planar coil portion is sufficiently secured to improve power transmission efficiency. It can be reduced in size and thickness.
  • This embodiment is basically the same as the first embodiment except that the positional relationship between the recess 33, the slit 34, and the vertical and horizontal slits 36 is partially different.
  • FIG. 6 is an assembly diagram of the non-contact charging module in the present embodiment.
  • the non-contact charging module 1 in the present embodiment places the planar coil portion 2 around which the conductive wire is wound and the coil surface of the planar coil portion 2, and the coil surface of the planar coil portion 2.
  • a magnetic sheet 3 provided so as to oppose to the magnetic sheet 3, extending from the winding start point of the planar coil portion 2 to the end of the magnetic sheet 3, and part of the conducting wire of the planar coil portion 2.
  • the longitudinal slit 36a and the end side 3a of the magnetic sheet 3 are not substantially parallel but have an oblique relationship
  • the lateral slit 36b and the end side 3b of the magnetic sheet 3 are not substantially parallel but have an oblique relationship.
  • the area of the vertical and horizontal slits 36 with respect to the area facing the coil 21 is increased (see FIG. 2). If the area of the vertical and horizontal slits 36 increases in the portion of the magnetic sheet 3 where the coils face each other, the leakage magnetic flux increases through the slits, and the power transmission efficiency of the non-contact charging module decreases.
  • the shape of the magnetic sheet 3 is rectangular, the longitudinal slit 36 a is substantially parallel to the end side 3 a of the magnetic sheet 3, and the lateral slit 36 b is substantially parallel to the end side 3 b of the magnetic sheet 3.
  • the vertical and horizontal slits 36 and the edges 3a and 3b of the magnetic sheet 3 do not cross obliquely, and there are few areas where the magnetic sheet 3 is broken down into small pieces. As a result, the same effect as described in the slit 34 can be obtained. That is, since the area where the vertical and horizontal slits 36 are formed is not increased more than necessary, it is possible to prevent the power transmission efficiency of the non-contact charging module 1 using the magnetic sheet 3 from being lowered.
  • the longitudinal slit 36a and the lateral slit 36b are orthogonal to each other so that they do not obliquely intersect with the end portions 3a and 3b of the magnetic sheet 3, and there are few areas where the magnetic sheet 3 is decomposed into small pieces. That is, since the area where the vertical and horizontal slits 36 are formed is not increased more than necessary, it is possible to prevent the power transmission efficiency of the non-contact charging module 1 using the magnetic sheet 3 from being lowered.
  • the slit 34 and the slit in one direction of the vertical and horizontal slits 36 are arranged in parallel.
  • the area in which the vertical and horizontal slits 36 are formed can be reduced while the flexibility of the magnetic sheet 3 is ensured.
  • the area of the vertical and horizontal slits 36 on the outer peripheral side where the coil 21 is arranged in the magnetic sheet 3 can be minimized. As a result, even if it is the magnetic sheet 3 provided with the softness
  • the slit width of the slit 34 is about 1 to 3 mm, and the interval at which the longitudinal slit 36a is formed is about 1 to 3 mm. If the slit width of the slit 34 is greater than or equal to the interval at which the longitudinal slit 36a is formed, at least one longitudinal slit 36a is necessarily included in the slit 34, and the slit 34 and the longitudinal slit 36a are included. Since the area of the vertical slits 36a is reduced by overlapping, an increase in the area where the thickness of the magnetic sheet 3 is reduced is prevented, and the power transmission characteristics of the contactless charging module 1 are prevented from being adversely affected, and non- It is possible to prevent the power transmission efficiency of the contact charging module 1 from being greatly reduced.
  • the width of the slit 34 is an integral multiple of the length of the interval at which the longitudinal slit 36a is formed, the end 33a of the slit 34 and the longitudinal slit 36a can be overlapped, so the flexibility of the magnetic sheet 3 Is further improved, the increase in the area where the thickness of the magnetic sheet 3 is reduced is prevented, the power transmission characteristics of the contactless charging module 1 are prevented from being adversely affected, and the power transmission of the contactless charging module 1 is prevented. It is possible to prevent the efficiency from being greatly reduced.
  • the vertical slit 36a and the horizontal slit 36b are formed at substantially the same interval. Thereby, directionality does not occur in the magnetic sheet.
  • Embodiment 3 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
  • the same numbers as those in Embodiments 1 and 2 mean the same thing.
  • the present embodiment relates to a method for manufacturing the magnetic sheet 3 of the contactless charging module according to the first and second embodiments.
  • the magnetic sheet 3 particularly refers to a ferrite sheet.
  • FIG. 7 is a diagram showing a manufacturing process of the non-contact charging module in the present embodiment.
  • FIG. 8 is a conceptual diagram of the non-contact charging module in the embodiment of the present invention.
  • the magnetic sheet 3 used in this embodiment will be described with reference to FIG. In particular, the reason why the protrusion 50 is formed on the back surface of the surface on which the cut 35 of the magnetic sheet 3 is formed will be described in detail.
  • an incision 35 having a depth of 0.1 mm is formed with a cutter blade at a pitch of 2.4 mm and 2.4 mm on the upper surface of a 0.6 mm thick ferrite sheet.
  • an acrylic adhesive (trade name: 9313B) having a thickness of 0.06 mm is formed on both surfaces (the A surface and the B surface in FIG. 7) of the magnetic sheet 3 on which the cuts 35 are formed.
  • a PET adhesive sheet 40 having Sumitomo 3M (registered trademark)).
  • the magnetic sheet 3 when the magnetic sheet 3 is placed on the adhesive sheet 40 and is divided by pressing with a roller or the like from above (breaking) after firing, it is V-shaped as shown in the figure.
  • the vertical and horizontal slits 36 are formed (not shown in the figure, but the slits are formed vertically and horizontally).
  • the V-shaped vertical and horizontal slits 36 allow the magnetic sheet 3 to have flexibility and are difficult to break.
  • notch 35 is made in a square, the rectangle containing a square may be sufficient.
  • the magnetic sheet 3 may be divided by pressing from below with a roller or the like. As a result, the cut 35 is used to be broken around the cut 35 so that it can be easily broken.
  • minute fragments are generated when the magnetic sheet 3 is pressed with a roller or the like from above and divided into the vertical and horizontal slits 36.
  • minute fragments are pushed by the rollers, they are pushed out below the vertical and horizontal slits 36.
  • protrusions 50 are formed at positions corresponding to the vertical and horizontal slits 36 on the surface (surface B in FIG. 7) opposite to the surface into which the cutter blade is inserted (surface A in FIG. 7).
  • the A surface where the protrusion 50 is not generated and the coil 21 are bonded using an adhesive.
  • the coil 21 is bonded to the A surface of the magnetic sheet 3 where no protrusion is generated while avoiding the B surface where the protrusion 50 is generated, so that the inclination of the surface of the coil 21 does not occur and there is a protrusion.
  • the coil 21 is not lifted when it is bonded to the surface.
  • the magnetic sheet 3 and the coil 21 can be securely and flatly bonded, and the power transmission of the non-contact charging module 1 can be reliably performed.
  • a plurality of cuts are made on the A surface of the magnetic sheet 3, a tape is applied to both surfaces (A surface and B surface) of the magnetic sheet 3, and the surface (A surface) with the cuts 35 is pressed to apply the vertical and horizontal slits 36. Therefore, it is possible to prevent small fragments generated when the cut 35 is made in the magnetic sheet 3 from being confined in the magnetic sheet 3 and adhere to the surface (A surface side) of the magnetic sheet 3.
  • the effect when the vertical and horizontal slits 36 are provided in the magnetic sheet 3 will be described.
  • the L value after giving damage such as vibration to the magnetic sheet 3 is 5% compared to the L value of the normal product (inductance value of the coil 21).
  • the L value after giving the same damage to the magnetic sheet 3 hardly changes.
  • interval of the vertical / horizontal slit 36 described the representative numerical value by embodiment, it is not necessarily limited to this.
  • the thickness of the magnetic sheet 3 is preferably 0.1 to 1 mm, the depth of blade insertion into the magnetic sheet 3 is preferably less than half the thickness of the magnetic sheet 3, and the interval between the vertical and horizontal slits 36 is preferably 5 mm or less.
  • the magnetic sheet 3 has V-shaped vertical and horizontal slits 36 formed vertically and horizontally at intervals of 2 mm in the thickness direction of the magnetic sheet in order to provide flexibility of the sheet. May be any shape as long as it is formed in a groove shape, for example, it may be U-shaped.
  • the concave portion 33 or the slit 34 is provided linearly in the overlapping portion.
  • the recess 33 is a groove having a bottom as shown in FIG. 8C
  • the slit 34 is a groove having no bottom as shown in FIG. 8D.
  • the foot portion 24 of the coil 21 is positioned inside the recess 33 or the slit 34, and the portion where the coil 21 overlaps can be kept at the same height as the portion where the coil 21 does not overlap. Thereby, thickness reduction of the whole apparatus can be achieved.
  • a linear recess 33 or slit that is parallel to the tangential line of the inner circumference of the coil 21 surface and extends at the shortest distance from the start or end of winding of the coil surface to the end of the magnetic sheet 3.
  • the concave tangent 33 or the slit 34 extends from the vicinity of the outer periphery of the inner peripheral circle of the coil 21 surface, and the concave portion 33 or the slit 34 is the inner periphery of the coil 21 surface. It is the tangent of the circumference of the inner circumference circle at a location approaching the outer circumference of the circle.
  • the length of the straight portion is about 5 mm to 10 mm.
  • the shape is parallel to the end side 3 a of the magnetic sheet 3 in order to provide the shortest distance to the end portion of the magnetic sheet 3.
  • the coil 21 may be wound in a polygonal shape, and in that case, the coil 21 may be perpendicular to the shape of the space formed by the inner end of the surface of the coil 21 or its tangent line.
  • the concave portion 33 or the slit 34 may be provided in a straight line extending from the end point to the end of the magnetic sheet 3 at the shortest distance.
  • the coil 21 is adhered to the surface of the magnetic sheet 3 where no projection is generated while avoiding the surface where the projection 50 is generated, the surface of the coil 21 is not inclined, and there is a projection.
  • the coil 21 is not lifted when it is bonded to the surface.
  • the magnetic sheet 3 and the coil 21 can be securely and flatly bonded, and the power transmission of the non-contact charging module 1 can be reliably performed.
  • the L value after giving damage such as vibration to the magnetic sheet 3 is reduced by about 5% compared to the L value of the normal product.
  • the L value after giving similar damage to the magnetic sheet 3 hardly changes.
  • This embodiment is partially different in the arrangement of the concave portion 33 or the slit 34 of the magnetic sheet 3 of the contactless charging module of the first, second, and third embodiments.
  • FIG. 9 is an assembly diagram of the non-contact charging module in the present embodiment.
  • FIG. 10 is a conceptual diagram of the non-contact charging module in the embodiment of the present invention.
  • FIG. 11 is a conceptual diagram of the magnetic sheet of the non-contact charging module in the embodiment of the present invention.
  • the coil 21 of the planar coil portion 2 shows only the innermost and outermost conductors, but the conductor of the coil 21 is wound between them.
  • terminals 22 and 23 are arranged close to each other, it becomes easy to handle the terminals when they are attached to the connector or when the wiring process to the subsequent stage is performed (details will be described later).
  • the magnetic sheet 3 is provided in order to improve the power transmission efficiency of non-contact charging using electromagnetic induction action and reduce magnetic flux leakage to the back surface of the magnetic sheet 3, as shown in FIG.
  • the flat part 31 and the recessed part 33 are provided.
  • the recessed part 33 (FIG.10 (b)) may be the slit 34 (FIG.10 (c)).
  • the central portion of the coil 21 is not necessarily limited to a flat portion, and may be a convex shape. That is, as shown in FIGS. 10B and 10C, by providing the concave portion 33 or the slit 34, the conductive wire from the winding end of the coil 21 to the terminal 23 can be accommodated in the concave portion 33 or the slit 34. Therefore, it can be made thinner.
  • the recess 33 or the slit 34 is formed to extend diagonally from the center of the magnetic sheet 3.
  • the terminals 22 and 23 can be formed with a smaller angle for bending the conducting wire.
  • the length of the recess 33 or the slit 34 is about 15 to 20 mm.
  • the length of the recess 33 or the slit 34 depends on the inner diameter of the coil 21.
  • the width and depth of the recess 33 or the slit 34 depend on the wire diameter and the number of steps of the conductive wire of the coil 21.
  • the width of the recess 33 or the slit 34 is about three times the wire diameter of the conducting wire of the coil 21, and the depth of the recess 33 or the slit 34 is somewhat larger than the wire diameter of the conducting wire of the coil 21 in the case of one-stage winding.
  • the corner of the magnetic sheet 3 is curved with an R.
  • R By adjusting the size of R, the distance between the two conductors 42 and 43 can be adjusted when the two conductors 42 and 43 are brought close to each other by being drawn from the planar coil portion 2.
  • the degree of freedom of arrangement increases, and the assembly of the non-contact charging module can be facilitated.
  • R by attaching R to the diagonal part of the magnetic sheet 3, it is possible to prevent the magnetic sheet 3 from increasing in size and to reduce the size of the contactless charging module 1.
  • the lead wire drawing shape of the coil 21 and the groove shape of the recess 33 or the slit 34 formed in the magnetic sheet 3 will be described in detail.
  • the shape of the concave portion (FIG. 10B) is used as a representative, but the same configuration can be adopted for the shape of the slit (FIG. 10C) to obtain the same effect.
  • the recess 33 is formed to extend diagonally from the center on the rectangular magnetic sheet 3. That is, the magnetic sheet 3 is provided with a groove of the concave portion 33 at an angle of approximately 45 degrees on the edge of the magnetic sheet 3.
  • the lead wire 42 drawn from the coil 21 at the point P is led to the recess 33 only by bending the lead wire 42 away from the center of the coil 21 at an angle of less than 90 degrees ( ⁇ 1 in FIG. 11). be able to. Therefore, it is possible to prevent a decrease in strength of the lead conductor 42 without applying excessive stress to the lead conductor 42 at the point P. That is, the reliability of the lead wire 42 can be improved.
  • the lead wire 42 bends at an angle of less than 90 degrees at the point Q in the same direction as the bending direction performed at the point P after passing through the recess 33 ( ⁇ 2 in FIG. 11).
  • the lead wire 42 can be brought close to and substantially parallel to the lead wire 43 drawn parallel to the edge of the magnetic sheet 3 in the tangential direction from the outermost periphery of the coil 21.
  • ⁇ 1 is 60 to 80 degrees
  • ⁇ 2 is 30 to 50 degrees. That is, the lead wire 42 was drawn in parallel to the edge of the magnetic sheet 3 in the tangential direction from the outermost periphery of the coil 21 by bending the lead wire 42 in two angles by combining the angles of ⁇ 1 and ⁇ 2 within these angle ranges. It is possible to easily bring the lead wire 42 close to and parallel to the lead wire 43, and to prevent the strength of the lead wire 42 from being reduced without applying excessive stress to the lead wire 42.
  • the concave portion 33 is provided on the end side (fourth quadrant in FIG. 11) from which the lead wire 43 is drawn on the magnetic sheet 3.
  • the lead-out lead wire 42 and the lead-out lead wire 43 drawn in parallel to the edge of the magnetic sheet 3 in the tangential direction from the outermost periphery of the coil 21 can be brought close to each other.
  • the terminals 22 and 23 of the planar coil portion 2 are arranged close to each other by providing the above-described two bends in the lead wire 42 drawn from the coil 21, the terminals are attached to the connector. It becomes easier to handle when performing wiring processing to the rear stage. Moreover, since the bending angle of the lead-out conducting wire 42 is less than 90 degrees in both places, the lead-out conducting wire 42 can be prevented from being deteriorated in strength without being excessively stressed. That is, the reliability of the lead wire 42 can be improved.
  • the present invention has the following features.
  • the contactless charging module includes a planar coil portion around which a conducting wire is wound, a magnetic sheet on which a coil surface of the planar coil portion is placed, the magnetic sheet, and the planar coil.
  • a recess or a slit that extends from the winding start point of the portion to the end of the magnetic sheet and accommodates a part of the conducting wire of the planar coil portion, and a plurality of flexible slits that give the magnetic sheet flexibility. At least one of the plurality of flexible slits is formed such that a virtual extension line of the flexible slit is disposed within the width of the recess or the slit.
  • the plurality of flexible slits are parallel to the longitudinal direction of the recesses or slits, so that the region where the magnetic sheet is thinned has the recesses or slits and the flexible slits. It is not necessary to increase by overlapping as much as possible.
  • the width W of the recess or slit and the plurality of flexible slit intervals P are in a relationship of W ⁇ P, and the virtual extension line of the flexible slit is the recess
  • the power transmission efficiency of the non-contact charging module is greatly reduced by including a flexible slit in the concave portion or slit of the magnetic sheet that accommodates the conductive wire of the planar coil portion by being arranged within the width of the slit. Can be prevented.
  • the magnetic sheet includes another flexible slit extending in a direction orthogonal to the plurality of the flexible slits extending in parallel to the concave portion or the slit, and the other flexible slit.
  • the magnetic sheet has flexibility with respect to the direction perpendicular to the plurality of flexible slits extending in parallel to the recesses or slits, so that the magnetic sheet has no directionality and has flexibility in two vertical and horizontal directions. It will be.
  • the planar coil portion is wound in a circle and the shape of the magnetic sheet is square, so that the shape of the square magnetic sheet that matches the circular coil Therefore, the portion of the unnecessary magnetic sheet that does not contribute to power transmission is extremely reduced, and the non-contact charging module can be configured with the minimum necessary size and can be miniaturized.
  • the width W of the recess or slit and the plurality of flexible slit intervals P have a relationship of W> P, and the virtual extension line of the flexible slit is the recess.
  • the width W of the recess or slit and the plurality of flexible slit intervals P have a relationship of W> P, and the virtual extension line of the flexible slit is the recess.
  • at least one imaginary line of the flexible slit is always present within the width of the recess or the slit.
  • the flexibility of the magnetic sheet can be further increased by matching any one of the plurality of flexible slits with the side wall extending in the longitudinal direction of the recess or slit. it can.
  • the magnetic sheet is a ferrite sheet, so that the AC resistance of the coil can be reduced.
  • a plurality of cuts are formed on one surface of the ferrite sheet, and then the one surface of the ferrite sheet is opposite to the one surface.
  • a sheet holding the ferrite sheet is bonded to each of the other surfaces, and then the ferrite sheet is fired, and then the ferrite sheet is pressed in the plurality of cuts by pressing the ferrite sheet.
  • the planar coil portion is In the pressurizing step, bonding is performed while avoiding protrusions formed at positions corresponding to the slits on the other surface.
  • the non-contact charging device adopts a magnetic sheet having flexibility by inserting a flexible slit, and thus the magnetic sheet is damaged and adversely affects power transmission characteristics.
  • the magnetic sheet is damaged by adopting the flexible magnetic sheet with slits, resulting in power transmission characteristics. It is possible to prevent adverse effects and to greatly reduce the power transmission efficiency of the non-contact charging module, so that portable devices such as mobile phones and portable computers, portable devices such as video cameras, etc. It is useful as a non-contact charging module for various electronic devices.
  • Non-contact charge module Planar coil part 21 Coil 22,23 Terminal 24 Foot 3 Magnetic sheet 3a, 3b End 31 Flat part 32 Center part 33 Recess 34 Slit 36 Vertical / horizontal slit 36a Vertical slit 36b Horizontal slit 37 Diagonal slit

Abstract

La présente invention concerne un module de charge sans contact, un dispositif de charge sans contact, et un procédé de fabrication du module de charge sans contact. L'adoption d'une feuille magnétique souple comportant des encoches permet d'empêcher un endommagement de la feuille magnétique, ce qui entraînerait un effet négatif sur les caractéristiques de transmission de puissance. De plus, ceci permet d'empêcher une diminution significative du rendement de transmission de puissance du module de charge sans contact. Le module de charge sans contact comprend : une unité de bobine plane ; une feuille magnétique, sur laquelle est montée l'unité de bobine plane ; une section en creux ou une encoche, qui est formée sur la feuille magnétique, et qui sert à loger une partie d'un fil conducteur de l'unité de bobine plane ; et une pluralité d'encoches souples, qui servent à donner de la souplesse à la feuille magnétique. Au moins une des encoches de la pluralité d'encoches souples est formée de façon à ce qu'une ligne d'extension virtuelle de l'encoche souple soit agencée dans la largeur de la section en creux ou de l'encoche.
PCT/JP2012/001640 2011-03-09 2012-03-09 Module de charge sans contact, dispositif de charge sans contact, et procédé de fabrication de module de charge sans contact WO2012120896A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US14/002,508 US8749195B2 (en) 2011-03-09 2012-03-09 Contactless charging module, contactless charging device, and method of manufacturing contactless charging module
EP12755170.3A EP2669913B1 (fr) 2011-03-09 2012-03-09 Module de charge sans contact, dispositif de charge sans contact, et procédé de fabrication de module de charge sans contact
CN201290000326.9U CN203706837U (zh) 2011-03-09 2012-03-09 非接触充电模块、非接触充电器以及电子设备
US14/266,288 US8963491B2 (en) 2011-03-09 2014-04-30 Contactless charging module, contactless charging device, and method of manufacturing contactless charging module

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP2011-051218 2011-03-09
JP2011051218A JP4835801B1 (ja) 2011-03-09 2011-03-09 非接触充電モジュール及び非接触充電機器
JP2011-051200 2011-03-09
JP2011051200A JP4835800B1 (ja) 2011-03-09 2011-03-09 非接触充電モジュール及び非接触充電機器
JP2011051210 2011-03-09
JP2011-051199 2011-03-09
JP2011051199A JP4962634B1 (ja) 2011-03-09 2011-03-09 非接触充電モジュールの製造方法
JP2011-051210 2011-03-09
JP2011-135945 2011-06-20
JP2011135945A JP4900524B1 (ja) 2011-03-09 2011-06-20 非接触充電モジュール及び非接触充電機器

Related Child Applications (2)

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US14/002,508 A-371-Of-International US8749195B2 (en) 2011-03-09 2012-03-09 Contactless charging module, contactless charging device, and method of manufacturing contactless charging module
US14/266,288 Continuation US8963491B2 (en) 2011-03-09 2014-04-30 Contactless charging module, contactless charging device, and method of manufacturing contactless charging module

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US (2) US8749195B2 (fr)
EP (1) EP2669913B1 (fr)
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CN203706837U (zh) 2014-07-09
EP2669913A1 (fr) 2013-12-04
EP2669913A4 (fr) 2014-03-26
US20130342162A1 (en) 2013-12-26
US20140232335A1 (en) 2014-08-21
US8749195B2 (en) 2014-06-10
CN204117820U (zh) 2015-01-21
US8963491B2 (en) 2015-02-24

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